{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3571",
    "entityType": "User",
    "nonce": "0x6473257578fab829f392d7f0d62efced0d45c22bc7bc136933c1850971210f2a",
    "signature": "0x077cf3e821f0ce3d91ef669fddda6681ddc33626237fc96cfdac65487e6a22ed11d7f37e2a1307e80a68496a0c85a30bd52ce7a0bc230c9d1df8267e9f60b1e21c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}